CVE-2026-23939 (GCVE-0-2026-23939)
Vulnerability from cvelistv5 – Published: 2026-02-26 19:41 – Updated: 2026-09-16 15:36
VLAI
EPSS
VEX
Title
Path Traversal in Local File Store Backend
Summary
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in hexpm hexpm/hexpm ('Elixir.Hexpm.Store.Local' module) allows Relative Path Traversal. This vulnerability is associated with program files lib/hexpm/store/local.ex and program routines 'Elixir.Hexpm.Store.Local':get/3, 'Elixir.Hexpm.Store.Local':put/4, 'Elixir.Hexpm.Store.Local':delete/2, 'Elixir.Hexpm.Store.Local':delete_many/2.
This issue does NOT affect hex.pm the service. Only self-hosted deployments using the Local Storage backend are affected.
This issue affects hexpm: from 931ee0ed46fa89218e0400a4f6e6d15f96406050 before 5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-26 20:24 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/hexpm/hexpm/security/advisorie… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-23939.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-23939 | related |
| https://github.com/hexpm/hexpm/commit/5d2ccd2f14f… | patch |
Impacted products
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"credits": [
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"lang": "en",
"type": "finder",
"value": "Michael Lubas / Paraxial.io"
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{
"lang": "en",
"type": "remediation developer",
"value": "Jonatan M\u00e4nnchen / EEF"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "Eric Meadows-J\u00f6nsson / Hex.pm"
}
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"value": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027) vulnerability in hexpm hexpm/hexpm (\u0027Elixir.Hexpm.Store.Local\u0027 module) allows Relative Path Traversal.\u003cp\u003eThis vulnerability is associated with program files \u003ctt\u003elib/hexpm/store/local.ex\u003c/tt\u003e and program routines \u003ctt\u003e\u0027Elixir.Hexpm.Store.Local\u0027:get/3\u003c/tt\u003e, \u003ctt\u003e\u0027Elixir.Hexpm.Store.Local\u0027:put/4\u003c/tt\u003e, \u003ctt\u003e\u0027Elixir.Hexpm.Store.Local\u0027:delete/2\u003c/tt\u003e, \u003ctt\u003e\u0027Elixir.Hexpm.Store.Local\u0027:delete_many/2\u003c/tt\u003e.\u003c/p\u003e\u003cp\u003eThis issue does NOT affect hex.pm the service. Only self-hosted deployments using the Local Storage backend are affected.\u003c/p\u003e\u003cp\u003eThis issue affects hexpm: from 931ee0ed46fa89218e0400a4f6e6d15f96406050 before 5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0.\u003c/p\u003e"
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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